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  1. /*
  2.  * Copyright (c) 2006 Josef Cejka
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup console
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <libc.h>
  36. #include <fb.h>
  37. #include <ipc/ipc.h>
  38. #include <kbd.h>
  39. #include <kbd/keycode.h>
  40. #include <ipc/fb.h>
  41. #include <ipc/services.h>
  42. #include <errno.h>
  43. #include <key_buffer.h>
  44. #include <ipc/console.h>
  45. #include <unistd.h>
  46. #include <async.h>
  47. #include <libadt/fifo.h>
  48. #include <screenbuffer.h>
  49. #include <sys/mman.h>
  50. #include <stdio.h>
  51. #include <sysinfo.h>
  52.  
  53. #include "console.h"
  54. #include "gcons.h"
  55.  
  56. #define MAX_KEYREQUESTS_BUFFERED 32
  57.  
  58. #define NAME "console"
  59.  
  60. /** Index of currently used virtual console.
  61.  */
  62. int active_console = 0;
  63. int prev_console = 0;
  64.  
  65. /** Information about framebuffer
  66.  */
  67. struct {
  68.     int phone;      /**< Framebuffer phone */
  69.     ipcarg_t rows;      /**< Framebuffer rows */
  70.     ipcarg_t cols;      /**< Framebuffer columns */
  71. } fb_info;
  72.  
  73. typedef struct {
  74.     keybuffer_t keybuffer;      /**< Buffer for incoming keys. */
  75.     /** Buffer for unsatisfied request for keys. */
  76.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t,
  77.         MAX_KEYREQUESTS_BUFFERED); 
  78.     int keyrequest_counter;     /**< Number of requests in buffer. */
  79.     int client_phone;       /**< Phone to connected client. */
  80.     int used;           /**< 1 if this virtual console is
  81.                      * connected to some client.*/
  82.     screenbuffer_t screenbuffer;    /**< Screenbuffer for saving screen
  83.                      * contents and related settings. */
  84. } connection_t;
  85.  
  86. static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual
  87.                          * consoles */
  88. static keyfield_t *interbuffer = NULL;      /**< Pointer to memory shared
  89.                          * with framebufer used for
  90.                          * faster virtual console
  91.                          * switching */
  92.  
  93.  
  94. /** Find unused virtual console.
  95.  *
  96.  */
  97. static int find_free_connection(void)
  98. {
  99.     int i;
  100.    
  101.     for (i = 0; i < CONSOLE_COUNT; i++) {
  102.         if (!connections[i].used)
  103.             return i;
  104.     }
  105.     return -1;
  106. }
  107.  
  108. static void clrscr(void)
  109. {
  110.     async_msg_0(fb_info.phone, FB_CLEAR);
  111. }
  112.  
  113. static void curs_visibility(bool visible)
  114. {
  115.     async_msg_1(fb_info.phone, FB_CURSOR_VISIBILITY, visible);
  116. }
  117.  
  118. static void curs_hide_sync(void)
  119. {
  120.     ipc_call_sync_1_0(fb_info.phone, FB_CURSOR_VISIBILITY, false);
  121. }
  122.  
  123. static void curs_goto(int row, int col)
  124. {
  125.     async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
  126. }
  127.  
  128. static void set_style(int style)
  129. {
  130.     async_msg_1(fb_info.phone, FB_SET_STYLE, style);
  131. }
  132.  
  133. static void set_color(int fgcolor, int bgcolor, int flags)
  134. {
  135.     async_msg_3(fb_info.phone, FB_SET_COLOR, fgcolor, bgcolor, flags);
  136. }
  137.  
  138. static void set_rgb_color(int fgcolor, int bgcolor)
  139. {
  140.     async_msg_2(fb_info.phone, FB_SET_RGB_COLOR, fgcolor, bgcolor);
  141. }
  142.  
  143. static void set_attrs(attrs_t *attrs)
  144. {
  145.     switch (attrs->t) {
  146.     case at_style:
  147.         set_style(attrs->a.s.style);
  148.         break;
  149.  
  150.     case at_idx:
  151.         set_color(attrs->a.i.fg_color, attrs->a.i.bg_color,
  152.             attrs->a.i.flags);
  153.         break;
  154.  
  155.     case at_rgb:
  156.         set_rgb_color(attrs->a.r.fg_color, attrs->a.r.bg_color);
  157.         break;
  158.     }
  159. }
  160.  
  161. static void prtchr(char c, int row, int col)
  162. {
  163.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  164. }
  165.  
  166. /** Check key and process special keys.
  167.  *
  168.  *
  169.  */
  170. static void write_char(int console, char key)
  171. {
  172.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  173.    
  174.     switch (key) {
  175.     case '\n':
  176.         scr->position_y++;
  177.         scr->position_x = 0;
  178.         break;
  179.     case '\r':
  180.         break;
  181.     case '\t':
  182.         scr->position_x += 8;
  183.         scr->position_x -= scr->position_x % 8;
  184.         break;
  185.     case '\b':
  186.         if (scr->position_x == 0)
  187.             break;
  188.         scr->position_x--;
  189.         if (console == active_console)
  190.             prtchr(' ', scr->position_y, scr->position_x);
  191.         screenbuffer_putchar(scr, ' ');
  192.         break;
  193.     default:   
  194.         if (console == active_console)
  195.             prtchr(key, scr->position_y, scr->position_x);
  196.  
  197.         screenbuffer_putchar(scr, key);
  198.         scr->position_x++;
  199.     }
  200.    
  201.     scr->position_y += (scr->position_x >= scr->size_x);
  202.    
  203.     if (scr->position_y >= scr->size_y) {
  204.         scr->position_y = scr->size_y - 1;
  205.         screenbuffer_clear_line(scr, scr->top_line);
  206.         scr->top_line = (scr->top_line + 1) % scr->size_y;
  207.         if (console == active_console)
  208.             async_msg_1(fb_info.phone, FB_SCROLL, 1);
  209.     }
  210.    
  211.     scr->position_x = scr->position_x % scr->size_x;
  212.    
  213.     if (console == active_console)
  214.         curs_goto(scr->position_y, scr->position_x);
  215.    
  216. }
  217.  
  218. /** Switch to new console */
  219. static void change_console(int newcons)
  220. {
  221.     connection_t *conn;
  222.     int i, j, rc;
  223.     keyfield_t *field;
  224.     attrs_t *attrs;
  225.    
  226.     if (newcons == active_console)
  227.         return;
  228.    
  229.     if (newcons == KERNEL_CONSOLE) {
  230.         async_serialize_start();
  231.         curs_hide_sync();
  232.         gcons_in_kernel();
  233.         async_serialize_end();
  234.        
  235.         if (__SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE)) {
  236.             prev_console = active_console;
  237.             active_console = KERNEL_CONSOLE;
  238.         } else
  239.             newcons = active_console;
  240.     }
  241.    
  242.     if (newcons != KERNEL_CONSOLE) {
  243.         async_serialize_start();
  244.        
  245.         if (active_console == KERNEL_CONSOLE)
  246.             gcons_redraw_console();
  247.        
  248.         active_console = newcons;
  249.         gcons_change_console(newcons);
  250.         conn = &connections[active_console];
  251.        
  252.         set_attrs(&conn->screenbuffer.attrs);
  253.         curs_visibility(false);
  254.         if (interbuffer) {
  255.             for (i = 0; i < conn->screenbuffer.size_x; i++)
  256.                 for (j = 0; j < conn->screenbuffer.size_y; j++) {
  257.                     unsigned int size_x;
  258.                    
  259.                     size_x = conn->screenbuffer.size_x;
  260.                     interbuffer[i + j * size_x] =
  261.                         *get_field_at(&conn->screenbuffer, i, j);
  262.                 }
  263.             /* This call can preempt, but we are already at the end */
  264.             rc = async_req_0_0(fb_info.phone, FB_DRAW_TEXT_DATA);
  265.         }
  266.        
  267.         if ((!interbuffer) || (rc != 0)) {
  268.             set_attrs(&conn->screenbuffer.attrs);
  269.             clrscr();
  270.             attrs = &conn->screenbuffer.attrs;
  271.            
  272.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  273.                 for (i = 0; i < conn->screenbuffer.size_x; i++) {
  274.                     field = get_field_at(&conn->screenbuffer, i, j);
  275.                     if (!attrs_same(*attrs, field->attrs))
  276.                         set_attrs(&field->attrs);
  277.                     attrs = &field->attrs;
  278.                     if ((field->character == ' ') &&
  279.                         (attrs_same(field->attrs,
  280.                         conn->screenbuffer.attrs)))
  281.                         continue;
  282.  
  283.                     prtchr(field->character, j, i);
  284.                 }
  285.         }
  286.        
  287.         curs_goto(conn->screenbuffer.position_y,
  288.             conn->screenbuffer.position_x);
  289.         curs_visibility(conn->screenbuffer.is_cursor_visible);
  290.        
  291.         async_serialize_end();
  292.     }
  293. }
  294.  
  295. /** Handler for keyboard */
  296. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  297. {
  298.     ipc_callid_t callid;
  299.     ipc_call_t call;
  300.     int retval;
  301.     kbd_event_t ev;
  302.     connection_t *conn;
  303.     int newcon;
  304.    
  305.     /* Ignore parameters, the connection is alread opened */
  306.     while (1) {
  307.         callid = async_get_call(&call);
  308.         switch (IPC_GET_METHOD(call)) {
  309.         case IPC_M_PHONE_HUNGUP:
  310.             /* TODO: Handle hangup */
  311.             return;
  312.         case KBD_MS_LEFT:
  313.             newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
  314.             if (newcon != -1)
  315.                 change_console(newcon);
  316.             retval = 0;
  317.             break;
  318.         case KBD_MS_MOVE:
  319.             gcons_mouse_move(IPC_GET_ARG1(call),
  320.                 IPC_GET_ARG2(call));
  321.             retval = 0;
  322.             break;
  323.         case KBD_EVENT:
  324.             /* Got event from keyboard driver. */
  325.             retval = 0;
  326.             ev.type = IPC_GET_ARG1(call);
  327.             ev.key = IPC_GET_ARG2(call);
  328.             ev.mods = IPC_GET_ARG3(call);
  329.             ev.c = IPC_GET_ARG4(call);
  330.            
  331.             /* switch to another virtual console */
  332.            
  333.             conn = &connections[active_console];
  334.  
  335.             if ((ev.key >= KC_F1) && (ev.key < KC_F1 +
  336.                 CONSOLE_COUNT)) {
  337.                 if (ev.key == KC_F12)
  338.                     change_console(KERNEL_CONSOLE);
  339.                 else
  340.                     change_console(ev.key - KC_F1);
  341.                 break;
  342.             }
  343.            
  344.             /* if client is awaiting key, send it */
  345.             if (conn->keyrequest_counter > 0) {    
  346.                 conn->keyrequest_counter--;
  347.                 ipc_answer_4(fifo_pop(conn->keyrequests), EOK,
  348.                     ev.type, ev.key, ev.mods, ev.c);
  349.                 break;
  350.             }
  351.  
  352.             keybuffer_push(&conn->keybuffer, &ev);
  353.             retval = 0;
  354.  
  355.             break;
  356.         default:
  357.             retval = ENOENT;
  358.         }
  359.         ipc_answer_0(callid, retval);
  360.     }
  361. }
  362.  
  363. /** Default thread for new connections */
  364. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  365. {
  366.     ipc_callid_t callid;
  367.     ipc_call_t call;
  368.     int consnum;
  369.     ipcarg_t arg1, arg2, arg3, arg4;
  370.     connection_t *conn;
  371.    
  372.     if ((consnum = find_free_connection()) == -1) {
  373.         ipc_answer_0(iid, ELIMIT);
  374.         return;
  375.     }
  376.     conn = &connections[consnum];
  377.     conn->used = 1;
  378.    
  379.     async_serialize_start();
  380.     gcons_notify_connect(consnum);
  381.     conn->client_phone = IPC_GET_ARG5(*icall);
  382.     screenbuffer_clear(&conn->screenbuffer);
  383.    
  384.     /* Accept the connection */
  385.     ipc_answer_0(iid, EOK);
  386.    
  387.     while (1) {
  388.         async_serialize_end();
  389.         callid = async_get_call(&call);
  390.         async_serialize_start();
  391.        
  392.         arg1 = 0;
  393.         arg2 = 0;
  394.         arg3 = 0;
  395.         arg4 = 0;
  396.  
  397.         switch (IPC_GET_METHOD(call)) {
  398.         case IPC_M_PHONE_HUNGUP:
  399.             gcons_notify_disconnect(consnum);
  400.            
  401.             /* Answer all pending requests */
  402.             while (conn->keyrequest_counter > 0) {
  403.                 conn->keyrequest_counter--;
  404.                 ipc_answer_0(fifo_pop(conn->keyrequests),
  405.                     ENOENT);
  406.                 break;
  407.             }
  408.             conn->used = 0;
  409.             return;
  410.         case CONSOLE_PUTCHAR:
  411.             write_char(consnum, IPC_GET_ARG1(call));
  412.             gcons_notify_char(consnum);
  413.             break;
  414.         case CONSOLE_CLEAR:
  415.             /* Send message to fb */
  416.             if (consnum == active_console) {
  417.                 async_msg_0(fb_info.phone, FB_CLEAR);
  418.             }
  419.            
  420.             screenbuffer_clear(&conn->screenbuffer);
  421.            
  422.             break;
  423.         case CONSOLE_GOTO:
  424.             screenbuffer_goto(&conn->screenbuffer,
  425.                 IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  426.             if (consnum == active_console)
  427.                 curs_goto(IPC_GET_ARG1(call),
  428.                     IPC_GET_ARG2(call));
  429.             break;
  430.         case CONSOLE_GETSIZE:
  431.             arg1 = fb_info.rows;
  432.             arg2 = fb_info.cols;
  433.             break;
  434.         case CONSOLE_FLUSH:
  435.             if (consnum == active_console)
  436.                 async_req_0_0(fb_info.phone, FB_FLUSH);
  437.             break;
  438.         case CONSOLE_SET_STYLE:
  439.             arg1 = IPC_GET_ARG1(call);
  440.             screenbuffer_set_style(&conn->screenbuffer, arg1);
  441.             if (consnum == active_console)
  442.                 set_style(arg1);
  443.             break;
  444.         case CONSOLE_SET_COLOR:
  445.             arg1 = IPC_GET_ARG1(call);
  446.             arg2 = IPC_GET_ARG2(call);
  447.             arg3 = IPC_GET_ARG3(call);
  448.             screenbuffer_set_color(&conn->screenbuffer, arg1,
  449.                 arg2, arg3);
  450.             if (consnum == active_console)
  451.                 set_color(arg1, arg2, arg3);
  452.             break;
  453.         case CONSOLE_SET_RGB_COLOR:
  454.             arg1 = IPC_GET_ARG1(call);
  455.             arg2 = IPC_GET_ARG2(call);
  456.             screenbuffer_set_rgb_color(&conn->screenbuffer, arg1,
  457.                 arg2);
  458.             if (consnum == active_console)
  459.                 set_rgb_color(arg1, arg2);
  460.             break;
  461.         case CONSOLE_CURSOR_VISIBILITY:
  462.             arg1 = IPC_GET_ARG1(call);
  463.             conn->screenbuffer.is_cursor_visible = arg1;
  464.             if (consnum == active_console)
  465.                 curs_visibility(arg1);
  466.             break;
  467.         case CONSOLE_GETKEY:
  468.             if (keybuffer_empty(&conn->keybuffer)) {
  469.                 /* buffer is empty -> store request */
  470.                 if (conn->keyrequest_counter <
  471.                     MAX_KEYREQUESTS_BUFFERED) {
  472.                     fifo_push(conn->keyrequests, callid);
  473.                     conn->keyrequest_counter++;
  474.                 } else {
  475.                     /*
  476.                      * No key available and too many
  477.                      * requests => fail.
  478.                     */
  479.                     ipc_answer_0(callid, ELIMIT);
  480.                 }
  481.                 continue;
  482.             }
  483.             kbd_event_t ev;
  484.             keybuffer_pop(&conn->keybuffer, &ev);
  485.             arg1 = ev.type;
  486.             arg2 = ev.key;
  487.             arg3 = ev.mods;
  488.             arg4 = ev.c;
  489.             break;
  490.         }
  491.         ipc_answer_4(callid, EOK, arg1, arg2, arg3, arg4);
  492.     }
  493. }
  494.  
  495. static void interrupt_received(ipc_callid_t callid, ipc_call_t *call)
  496. {
  497.     change_console(prev_console);
  498. }
  499.  
  500. int main(int argc, char *argv[])
  501. {
  502.     printf(NAME ": HelenOS Console service\n");
  503.    
  504.     ipcarg_t phonehash;
  505.     int kbd_phone;
  506.     size_t ib_size;
  507.     int i;
  508.    
  509.     async_set_client_connection(client_connection);
  510.    
  511.     /* Connect to keyboard driver */
  512.     kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
  513.     while (kbd_phone < 0) {
  514.         usleep(10000);
  515.         kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
  516.     }
  517.    
  518.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
  519.         return -1;
  520.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  521.    
  522.     /* Connect to framebuffer driver */
  523.     fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
  524.     while (fb_info.phone < 0) {
  525.         usleep(10000);
  526.         fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
  527.     }
  528.    
  529.     /* Disable kernel output to the console */
  530.     __SYSCALL0(SYS_DEBUG_DISABLE_CONSOLE);
  531.    
  532.     /* Initialize gcons */
  533.     gcons_init(fb_info.phone);
  534.     /* Synchronize, the gcons can have something in queue */
  535.     async_req_0_0(fb_info.phone, FB_FLUSH);
  536.    
  537.     async_req_0_2(fb_info.phone, FB_GET_CSIZE, &fb_info.rows,
  538.         &fb_info.cols);
  539.     set_rgb_color(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  540.     clrscr();
  541.    
  542.     /* Init virtual consoles */
  543.     for (i = 0; i < CONSOLE_COUNT; i++) {
  544.         connections[i].used = 0;
  545.         keybuffer_init(&connections[i].keybuffer);
  546.        
  547.         connections[i].keyrequests.head = 0;
  548.         connections[i].keyrequests.tail = 0;
  549.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  550.         connections[i].keyrequest_counter = 0;
  551.        
  552.         if (screenbuffer_init(&connections[i].screenbuffer,
  553.             fb_info.cols, fb_info.rows) == NULL) {
  554.             /* FIXME: handle error */
  555.             return -1;
  556.         }
  557.     }
  558.     connections[KERNEL_CONSOLE].used = 1;
  559.  
  560.     /* Set up shared memory buffer. */
  561.     ib_size = sizeof(keyfield_t) * fb_info.cols * fb_info.rows;
  562.     interbuffer = as_get_mappable_page(ib_size);
  563.  
  564.     if (as_area_create(interbuffer, ib_size, AS_AREA_READ |
  565.         AS_AREA_WRITE | AS_AREA_CACHEABLE) != interbuffer) {
  566.         interbuffer = NULL;
  567.     }
  568.  
  569.     if (interbuffer) {
  570.         if (ipc_share_out_start(fb_info.phone, interbuffer,
  571.             AS_AREA_READ) != EOK) {
  572.             as_area_destroy(interbuffer);
  573.             interbuffer = NULL;
  574.         }
  575.     }
  576.    
  577.     curs_goto(0, 0);
  578.     curs_visibility(
  579.         connections[active_console].screenbuffer.is_cursor_visible);
  580.    
  581.     /* Register at NS */
  582.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
  583.         return -1;
  584.    
  585.     /* Receive kernel notifications */
  586.     if (sysinfo_value("kconsole.present")) {
  587.         int devno = sysinfo_value("kconsole.devno");
  588.         int inr = sysinfo_value("kconsole.inr");
  589.         if (ipc_register_irq(inr, devno, 0, NULL) != EOK)
  590.             printf(NAME ": Error registering kconsole notifications\n");
  591.        
  592.         async_set_interrupt_received(interrupt_received);
  593.     }
  594.    
  595.     // FIXME: avoid connectiong to itself, keep using klog
  596.     // printf(NAME ": Accepting connections\n");
  597.     async_manager();
  598.    
  599.     return 0;
  600. }
  601.  
  602. /** @}
  603.  */
  604.